Donald J. Greggain, M.D.
Family Medicine Physician · Lewiston, ID
Donald J. Greggain, M.D. is a family medicine physician with a practice address in Lewiston, Idaho, and NPI 1154328052, issued on Jul 7, 2005. Check the license (Idaho M-6680, as entered in NPPES) on the Idaho Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Donald J. Greggain
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- M-6680 ID
32331 WA
Self-reported in NPPES; status is on the state search - Practice location
- 415 6TH St Ste 3C, Lewiston, ID 83501
- Phone
- (208) 750-3840
- Enumerated
- Jul 7, 2005
- Record last updated
- Dec 26, 2024
- Fax
- (208) 750-3839
- Medicaid IDs
- 1003592 WA
1154328052 ID
003310000 ID - Medicare enrollment
- Enrolled (PECOS I20110607000534); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 1,316 in Idaho → Look up another NPI →
Also registered at 415 6TH St Ste 3C
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jenna DarnellFamily Nurse Practitioner1447033386
- Barbara Davis, MDInternal Medicine Physician1699746859
- Kayla MillerFamily Nurse Practitioner1972280592
- Belinda Roberts, NPFamily Nurse Practitioner1457669863
- John Rudolph, D.O.Family Medicine Physician1548503022
Verify Donald J. Greggain in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIdaho Board of Medicine
Search for license M-6680Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.0 times the Medicare Part D claims of the average family medicine physician in 2024
10,586 Medicare Part D claims for 493 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 968 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen435 claims
- Levothyroxine Sodium391 claims
- Atorvastatin Calcium328 claims
- Losartan Potassium252 claims
- Omeprazole246 claims
- Gabapentin213 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $124.31
2 payments; by number, the most common kind was food and beverage; the largest payer was Phathom Pharmaceuticals, Inc. The 55,478 providers of this specialty with any payment received $902.55 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- St Joseph Hospital LLCLewiston, ID
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Donald J. Greggain among 1,316 family medicine physician records in Idaho
Donald J. Greggain, M.D. is one of 1,316 family medicine physician records with a practice address in Idaho. 78% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 91% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1980 · median 2009 among the 793 with a school on file
- Record last updated2024 · 49% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Idaho practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
21 family medicine physician records list a practice address in Lewiston
They are 21 of the 764 NPPES records with a practice address in Lewiston, and 1,316 family medicine physician records in Idaho.
All 1,316 in Idaho → Every provider in Lewiston → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Michael Baldeck, D.O.Lewiston, ID 835011669428967
- Michael Blue, DOLewiston, ID 835011558309393
- Larry Harries, MDLewiston, ID 835011033105994
- Frances Hedrick, MDLewiston, ID 835011972694438
- Christopher Iacobelli, MDLewiston, ID 835011649295866
- Glenn Jefferson, MDLewiston, ID 835011326121286
- Gerald Knouf, MDLewiston, ID 835011609989359
- Richard Leon, MDLewiston, ID 835011972562841
Common questions
What is Donald J. Greggain, M.D.'s NPI number?
Donald J. Greggain, M.D.'s National Provider Identifier (NPI) is 1154328052, issued on Jul 7, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Donald J. Greggain, M.D. located?
The NPPES record lists a practice address at 415 6TH St Ste 3C, Lewiston, ID, 83501. Phone: (208) 750-3840. Providers update this record themselves, so call before visiting.
How can I verify Donald J. Greggain, M.D.'s license?
NPPES lists Idaho license number M-6680, as entered by the provider. Search the Idaho Board of Medicine at https://dopl.idaho.gov/bom/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Donald J. Greggain, M.D. prescribe under Medicare Part D?
In 2024, Donald J. Greggain, M.D. had 10,586 Medicare Part D claims for 493 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.